How many weeks till flip? runtz and grease monkey

Your plants are mature enough to flip as soon as they are showing their sex, technically. Whether that is the frame above the soil you desire or the root structure beneath you are happy with, that is the question. I see some training going on. I'd personally wait for the plant to face the lights from the last round of training before flipping with the understanding that your plant's frame is going to drastically change in the three weeks following the flip.

Maturity happens around week 8 to 10. The plant will start producing stray pistils at the nodes, plus the growth will start looking different.

I wouldn't wait much longer. Growth is exponential up to a point that you are far from currently. It only gets faster with time... 4 plants in a 3x3... maybe 21-28 days tops are necessary. shoot for 450g total, that's 112.5g each.. 3-4 weeks still sounds good. YMMV on growth rate, adjust as needed. Heavy yielding genetics will do better ethan 50g/sq ft. when it fills about 1/2 of the area, you are good to go. 4.5 sq ft give or take.. takes a little imgination.. if they are roughyl 1x1 you are nearly there. If you flip without overgrowing, you'll eliminate a lot of wasted time and electricity while pruning off less plant over time. If any plant is not growing at a similar rate, may need to compensate a bit or allow a little more vege time etc... do what you have to do. As far as minimum time to flip? similar to autoflowers 2+ weeks. I'd wager there is genetic variety for any 1 plant just as some plants only need 10 hours of darkness to flip to flower and others need more. I've never done less than 4 weeks, and i've never seen any correlation to better or worse results due to length of vege. At worst it just sits in 12/12 until it is biologically capable of going into flower.

Hi, usually many do it between the 4 and 6 weeks of the vegetative phase. Some let them grow a bit longer until they reach what they wanted. I think you can switch after 6 weeks if you have finished your training. Then they go into the stretching phase again and gain a lot of volume. And after that, there are Buds Buds Buds :) hope that helps you and good luck with the grow!